Punching and cutting machine.



J. SCHWARTZKOPF. PUNCHING AND CUTTING MACHINE.

Patented Ja11.29,1918

JACOB SCHVVARTZKOIPF, 0F STANFORD, MONTANA.

l-UNCHING CUTTING MACHINE.

Specification bf Letters Patent.

Patented. Jan. 2a; was.

7 Application filed August 11, 1916. Serial No. 114,436.

T 0 all whom it may concern Be it known that I, J AQOB ScrrwAn'rzKorr, a citizen of the United States, residing at Stanford, in the county of Fergus and State of Montana, have invented certain new and useful Improvements in Punching and Cutting Machines, of which the following is a specification.v

This invention relates to punching or shearing devices, and has for its primary object to provide a simple and improved device for developing a high degree of power to be used in punching or shearing metallic, work.

A further object of the invention is to provide a device of this character which is capable of being operated efficiently byhand, but which may be, readily coupled or connected with electric, steam, or gasolenev motors to develop a greater degree of powQL,

A still further object of the invention is, to provide a machine of this character wherein there is employed an oscillatory jaw which is, rocked through the medium of a rack segment, and wherein an improved shipper mechanism is, employed for transmitting oscillatory movement to, the jaw from a shaft rotating in but one direction.

A still further and particular object oi the invention is to provide a device of this character embodying means for the adjustment thereto of punches, dies, shearing blades and other similar devices of various constructions and for various purposes.

With these objects in view, together with others, which will appear as the description proceeds, the invention resides in the novel formation, combination and arrangement of parts, all as will be described more fully hereinafter, illustrated in the drawings, and particularly pointed out in the claims.

The invention will be best understood by reference to the accompanying drawings, wherein The figure is a side elevation of a cutting or punching machine constructed in accordance with my invention.

Referring now more particularly to the drawings, 4 indicates a base which, in the present instance, is in the form of an elongated metallic plate having openings 5 therein to enable the same to be secured to a suitable bed. One end of the plate 4 is enlarged as shown, and is cut away at its ex= tremity to provide a jaw portion 6, the 1at= ter forming a table upon which may he socured dies 7.

The plate4 adjacent its. jawend is provided on. one'face with a block portion 8 at,

one end of which is arranged a bracket 9 directly above the table formed at the jaw portion 6 of the said face. v

A movable, jaw 10 is pivoted as at 11 tothe block portion 8 of the base and i's capar ble of being rocked toward and away from the. fixed jaw of the table 6. Pivoted to. the outer extremity of the movable jaw is a punch block 12, the latter extending downwardly from the jaw and is confined at its lower extremitywithin the bracketfi). This punch block is constructed in such manner as, to. accommodate the tangs of punches of various constructions. The opposite end of the, movable jaw extends longitudinally and centrally of the plate 4 throughout substan ti'ally one-half the length of. the latter. The lower edge of this portion of the. jaw maybe beveled as at 12 to form a cutting edge and the block portion 8 ofthe plate at is apertured as at 13 for the reception of work to, be. cut by the edge 12. of the lever.

To. the outer extremity of the lever or jaw 10 is d'e'tachably secured a rack segment or sector 14. This sectorhas a central arm 15,

the inner end of which is adapted to lie behind and to be secured to the outer end of the jaw or lever 10 by screw members or bolts 16. The adjacent jaw end is provided with longitudinally disposed slots 17 through which the bolts 16 project, and which construction permits of the adjustability of the sector longitudinally of the jaw member.

A shaft 18 is arranged upon a plate a, and has rotatably mounted thereon, a pinion 19 for engagement with the teeth of the arcuate member or sector 14. A relatively large gear wheel 20 is attached to the pinion 19, and a power pinion 21 at the free ex-.

tremity of the plate 4 enmeshes with the gear wheel to rotate the latter. This power pinion is rotated by means of a crank handle 22.

It will be observed that the sector 14 comprises an arcuate slot, the concentric edges 23 and 24 of which are equipped with teeth to be engaged by the pinion 19. The ends vof the toothed portions of the sector are connected as shown, and the teeth extend partially throughout this connecting portion.

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From this construction, it is apparent that rotary movement delivered to the pinion 21 will rotate the gear 20 and cause similar movement to be delivered to the pinion-l9, As the pinion 19 engages the teeth at one side or the other of the slotted portion of the sector, the latter is moved upwardly or downwardly. 'lhe screws 16 constitute guide pins for the inner end of the jaw 10, and extend loosely through the openings 17, thus permitting the central arm 15 to move longitudinally of the base plate 4. As the end of the sector contacts with the pinion 19, the teeth arranged upon a portion of the end connecting member will be engaged by the pinion teeth and the sector will be slid outwardly or inwardly of the jaw or lever 10 so that the rack teeth of the opposite edge will be enmeshed with the pinion. This arrangement enables the sector to be moved in opposite directions while the pinion 21 is rotating in but one direction. It is also to be observed that the shifting of the sector is automatic. V From the above description, it will be observed that I have provided an extremely simple machine for accomplishing the desired ends, and one which is constructed in such manner as to insure the same against breakage or derangement. The supporting plate or base 4 may be readily attached to or detached from a suitable standard or sup= ort,

lVhile the above is a description of the preferred embodiment of the invention, it is apparent that various changes in the mi nor details of construction and arrangement reassess of parts may be resorted to without departing from the. spirit of the invention or ex ceeding the scope of the claims.

What is claimed is 1. In a device of the class described, the combination with fixed and movable jaws, the said movable jaw being provided with elongated openings, an arm, bolts connecting said arm with said movable jaw through said elongated openings, spaced concentric rack members at the extremity of said arm, the said rack members being connected at their extremities, teeth on portions of said connections, a pinion arranged between said rack portions and adapted to engage with the same one at a time, and means for rotating said pinion, substantially as described.

2. In a device of the class described. a fixed jaw, a movable jaw pivoted adjacent said fixed jaw and being adapted to move toward and away from the latter, the rear end of said movable'jaw being provided with elongated slots, a sector having an arcuate slot closed at both ends, rack teeth on said sector projecting from the edges defining said arcuate slot, the said teeth ex* tending partly across the closed ends of said slotted sector, a gear, a pinion carried by said gear and in mesh with the teeth in said sector, and means for rotating said gear, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses,

JACQB SCHWARTZKOPF. "ii/itnessesz- GILBERT ibanson, Faro Jonnsom (Gopilea of this patent may he obtained for are cents each, by addressing the @orimilssioaer at Eatents,

Wasgtcn, D, G, 

